166872005211 has 8 divisors (see below), whose sum is σ = 222668623440. Its totient is φ = 111161695232.

The previous prime is 166872005207. The next prime is 166872005213. The reversal of 166872005211 is 112500278661.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 166872005211 - 2² = 166872005207 is a prime.

It is a super-2 number, since 2×166872005211² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 166872005211.

It is not an unprimeable number, because it can be changed into a prime (166872005213) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21572550 + ... + 21580283.

It is an arithmetic number, because the mean of its divisors is an integer number (27833577930).

Almost surely, 2^166872005211 is an apocalyptic number.

166872005211 is a deficient number, since it is larger than the sum of its proper divisors (55796618229).

166872005211 is a wasteful number, since it uses less digits than its factorization.

166872005211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43154125.

The product of its (nonzero) digits is 40320, while the sum is 39.

The spelling of 166872005211 in words is "one hundred sixty-six billion, eight hundred seventy-two million, five thousand, two hundred eleven".